Spray nozzle



May 11, 1937.

H. HOLMBOE SPRAY NOZZLE v Filed Aug. 14. 1935 regulating` the volume oftlzi a. Spruyt-nozzle Ipositioned with ized liquidA spayinethef vicinity of' thengrindinge 5 Wheel for .niteipitatingf` ttheyne "dust i particles given olf during', the grindingtoperation `a-'nuzlfor .i lu nniiifyingf` thenain-aroundsaid;I `wheel.I

,jIfh'ev inyention generally "relates to 'the provisonoftnovel means fondeliyering avinelyr` atomsulle aiiypxf other {gasearorbyxpressureonly;` to the working surfaeoi'abljading wheels inggeneral to insure af :Wet-fri Wofkingrf surface' land-a hurvnd i atmospherejaoundethelwheelibut which willfot A Vfurther"A object ofutlieiinuen l yan improvedsprayl nozle ati' f 15 resultinthe.dripping:ofimoisturifromthe.wheel.

tion is" 'to provide nii adjustable 1VVA -ylevf maken su tantially yonrrgthe 55 llfisf @freut elevational IView` 0f the Appliatit August `14,`

for ins'.

`1935,*h seal i .nozz e showing the 'several openings..foi discharge of..the liquidfand gas, 'respectivelmand"L n j Figure isra sectional -viewtak'en through the ,A supporting braoketfor the spray nozzle substan-V w.tiallyalongeline-Sofiiigure 1. w Referringpparticularly to `'igurell, a conven- .Mtionallfabradinguwheel I Uv is-disolosed,` suitably w V lined- ,110 and rotated by shaft I I I and lwhich is 11-PQsitonedvfor.Contactwith thefworkfpieee I2 to be groundor-polishedgzas the 1case may- `be'.` i t 'I h'e frame of t-he grinder indicated "in its entirety byy-l3` has suitably, secured theeto ua. bracket I4 1 b ymeansoffthejsecuring `bolts I5; The bracket .is provided 1 with `a, base'` portion I6. channeled throughout Vsflf e r 1 gth to Aform .a guideway .as i shown in Fgu're. Depending from' the base at l one end; thereog is a iixed support-Il and mounted on movement AWithin the guideway1 isf a, movable IJOX' H- i. 4 ,'e .braeketlasgbove described is providedkfor 2 .the purpose bfi-supporting thexsnrey' nozzle I20 @adjgklcenu the4 periphery of- `the* grinding wheel, 'flgfthe Spray nozzlel having threadedengagement witntllfiair supply pipe ifI vt'hioh,passes.through4 an: lehinginisupport I'Lof slightly I argersize 2 than 'thetexteriorf of the tube topermit movement fof 1 the`s`ame withrespeet tothe support.- -I'l'1e i `pip""ZIfallsoj extends throughan opening in the 'to adjust the position of"` the fspray xjlonzleI` with 3 ,'respeetjtoLthe grinding Wheelis Vaocornplishedby I `jelongated s erewis shapedmsdlthat any available 4( Sh'ed forniatin'in Yertical cross section to plo- "45 I disposedatright angles to veach other and which gas streams will meet at a distance from the surfaces 24 and'25 and substantially in `alignment with the vcenter of the angular connecting surface 26.

The liquid to be atomized is supplied to the spray nozzle 20'by pipe 30Figure 4, and the body of the spray nozzle is provided with a passage 3| connecting said pipe with a diagonal passage 32 housingtheneedle valve 33. Theaend orisaid passage adjacent surface 2 6` isvprovidedlwith an;

insert 34 having a vsmall orifice 35, the size of which can be regulated by varying the position of the needle valve 33v Withrespect tothe 'I'he needle Avalve is providedfwith al same. threaded end 36which is threaded intojthe lower portion ofpassage 32 and heldin the desired position by the lock nut 3 1. 'The liquid'irom pipe f 3 '0 is delivered to the diagonal passage 3 2 and issues from orice 35, the amount of liquid discharged .by said oriiice being regulated n by: the

size of the same,--which can `be.varied4 by` screwing,v theineedle valve forward, or'.-rearward with respect-,to said oriiice..;r The stream of liquid issuing fronrsaid orifice isfdirectedintofthe,path of various'outlets for the gas and 'liquid are so arranged that the streams meet at avcomrnon point indicatedinFigure-l by. numeral38. Asa result"the-liquidiis brokenup by' said gas streams into anely,atomizedsprayand is directed at `1 a'n .angle to the workingsurfaceof the abradmg wheel I0, An adjustable plate'40 isfsecured to thertop surface of the spray nozzle -by'screw`4l andv functions to prevent grinderdust from clogl ging the liquid outlet.

- 1 The spray nozzle and' supporting' means there- `.This isdirected'against-the working surface of I The' action of thegas streams'which distributed'in thef'fom of aat fan-shaped spray.

"-ft'he grinding wheel at an anglethereto and in stood that the direction Ior the abrading wheel ing isincreased I0, as shown infFi'gure `1,4 is clockwise. The at fan-shaped *spray insures fa wet grinding or poli'shing surface' o n the wheel and alsoy a humid V atmosphere around the' wheel, but the moisture "Y is"not concentrated to an extent whichwill provduce dripping.` The'spray has the effect ofr wet- `tin`gfand precipitating the ne dust f p'articles produced by the'grinding operation andwhich \vould otherwiser vfloat vin the air. By maintaining4 the workingjsurfaceof'the wheel uniformly -wet the cutting dualities, of'said wheel A,are thereby improved and rfatev'of grinding or`polish- As `the grindingwheel wears ldovvfnthe position orthespraynozzle 20 can4 be yvaried by rotation o f elongated Vs crev'v.'23, which resultsin, movement Aoi ltheA support "1 8 and" corresponding movement of said; sprayv nozzle.V In this' manner the distance between said nozzle and the working sur-` face of the wheel can' be maintained substantially luniformj j f or all' grinding operations, Also4 ad- 4j ustment ci the needle valvecan be-changed from time to time to regulate the quantity `Or-Iiquid 'to be atomized to suit'conditionsgl Y The invention isnot to be limited to or by details `of construction of the particular embodiment thereof illustrated by the drawing, as various other forms of the device will of course be apparent to those skilled in the art without departing from the spirit of the invention or vthe scope of the claims.

What is claimed is:

-1. The combination with a grinding or polishin g `wheeLof means for'humidifying-the air in the vicinitythereof,comprising a spray nozzle for directing a spray of nely atomized liquid toward the working surface of the wheel, said spray nozzle being positioned to direct said spray at an =angle against the direction of rotation of the wheel, and means locating the spray nozzle adja- Icent the'wheel and at a point in advance of the point of grinding'with respect to the direction of rotation of said wheel.

The combination with a grinding or polishing wheel-,`of means for A'humidifying' the air in `the `vicinity thereof,A comprising a spray nozzle for directing a spray of flnely-fatomizedliquid toward the working surface of the wheel, said spray nozzle being positioned to direct said spray Vat, an angle againstI the direction'fof rotation of the wheel, `and means locating the spray nozzle adjacent the-wheel and. at-'apoint in advance of the point of grinding with respect to the direction- Aof rotation of said'wheel, said means being adjustworkingsurface of .the wheel."

3; The combination with a' grinding and'polishable in a. `direction substantially normal to the i ing' wheel, of. means -for fhumidifying 'the Aair in ,the ,vicinity ,thereof,comprisinga` spray nozzle `having Aan orifice discharging-a `fluid stream toward theworkihgsurface of the wheel-.andin a direction at an angle against the rotation of said wheel, said ynozzle having openings "i'or'A discharging uid, means, in thegpath of said stream at a distance from thevnozzle for atomizingasaid stream, and adjustable supporting'means'locatingv said nozzle adjacent the working surface of said wheel. e

4.7`The combination with a grinding or polishingwheel, of. .means for directing aspray of finely atomized ,liquid yagainsttheworking surface of the wheel, comprising-a spray nozzle having an orice discharging a fluid stream toward the workingsurface ofthe Wheel and in a directionv at an vAangleagainst the rotation of,` saidfwheel, said `nozzle having openings disposed atv right angles t o each other delivering air blasts into the path of said stream, whereby said fluid stream is atomized at a point exterior o`f the nozzle, and adjustable' means locating said. nozzle adjacent the workingsurface of the wheel.;y f

5. The combinationwith agrinding or polishing wheel; of -means for. directingy a flat fanshapedV sprayjof finely atomized liquid into contact with the" working surface of said wheel, comprising a spray nozzle including va Abodyportion havinga Vplurality, of passagesA therein, one

passage connecting with a source of iiuidfsupply under pressure and leading` to an orifice from which-the fluidlis ydischarged'asf'a stream, said zother passages joining' andv connecting with a source of air supply under pressure,v andeach of said other passages having ian'opening' delivering an air blast into the path of said fstreamtocause" atomization-fof the same at`a`point1 exterior of the nozzle, and adjustable: means' locating said spray nozzle'adjacenttheworking'surface of the wheel, said means positioning the nozzle so 'that Ysaid sprayis directed'towardy the working surface of the wheel at an angle against its direction of rotation.

6. The combination with a grinding or polishing wheel, of means for directing a flat fanshaped spray of iinely atomized liquid into contact with the working surface of said Wheel, comprising a spray nozzle including a body portion having a plurality of passages therein, one passage connecting with a source of fluid supply l0 under pressure and leading to an orice from which the fluid is discharged as a stream, said other passages joining and connecting with a source of air supply under pressure, and each of said'other passages having an opening delivering l5 an air blast into the path of said stream to cause atomization of the same at a point exterior of the nozzle, said nozzle directing the spray of atomized liquid toward theworking surface of the wheel and in a direction at an angle against 20 the rotation of said wheel, and adjustable means locating the spray nozzle adjacent the working surface of the wheel and at a point in advance of the point of grinding with respect to the direction of rotation.

7. The combination with a grinding or polishing wheel, of means for humidifying the air in` the vicinity thereof, comprising a spray nozzle including a body portion having a pair of surfaces disposed at right angles to each other and having a diagonal surface connecting the same, a passage in the body portion having an orice located in the diagonal connecting surface, means supplying said passage with a fluid under pressure whereby the same is discharged from said orifice, other passages in the body portion having an opening in the right angle surfaces respectively, a source of air supply under pressure connecting with said passages whereby air blasts are discharged from said openings into the path of the fluid delivered by the orifice to produce a spray ofi'lnely atomized liquid, said spray nozzle being positioned so as to direct the spray toward the working surface of the wheel and at an angle against its direction of rotation, and adjustable means for locating the spray nozzle adjacent the Working surface of t'ne nozzle.

HAROLD HOLMBOE. 

